Method for determining the average width of luminescent stripes of a viewing screen
AssigneeRCA Corporation
InventorFrank R. Ragland, Jr.
Life of this patent
Estimating the term…
Abstract
In the novel method, the widths of the parallel luminescent stripes of a luminescent viewing screen are scanned by a beam of ultraviolet light whereby the stripes are excited to emit light along the path of scan. The emissions of the light in an identifying spectral band are sensed with respect to the position of the light beam on the screen and converted to a train of electrical signals. Then, the average width of the stripes identified by the spectral band is calculated from the distance over which the intensities of the signals are continuously above an assigned value.
Claims10
A method for determining the average width of luminescent stripes in a localized area of a luminescent viewing screen of the type comprising a plurality of parallel photoluminescent stripes, said method including
- (a) scanning the widths of said stripes by a beam of ultraviolet light, whereby said stripes are excited to emit light along the path of said scan,
- (b) sensing and converting to a train of electrical signals the emissions of light in an identifying spectral band emitted by selected ones of said stripes in said localized region with respect to the position of said spot in said path,
- (c) and then calculating the average width of said selected ones of said stripes from the calculated distance over which the emissions of said signals are continuously above an assigned value.
Dependencies are inferred from the claim text.